ImageJ module question

[imagingbook]

I noticed that the ij Java module does not appear as a named module when InageJ is executed. For example, inside a plugin

IJ.log("IJ module = " + IJ.class.getModule());
IJ.log("IJ module name = " + IJ.class.getModule().getName()); 

gives

IJ module = unnamed module @10571272
IJ module name = null

and also the module is not listed by

for (Module m : ModuleLayer.boot().modules()) {
     IJ.log(m.toString());
}

Unfortunately this is the same for other external modules that are loaded by IJ (including my own). Being no expert on this, the motive behind this question is that I want to use annotations on imported modules for specific settings.

Is this perhaps related to ij.jar being compiled for language level 1.6?

Running IJ 1.53v under Java 17.0.5 (WIn7).

[rasband]

On Jan 8, 2023, at 1:33 PM, Wilhelm Burger @.***> wrote:

I noticed that the ij Java module does not appear as a named module when InageJ is executed. For example, inside a plugin

This problem does not appear to be related to ij.jar being compiled for Java 1.6. I compiled ij.jar for Java 8 (and Java 11) and the problem persisted. The ij.jar file is compiled for Java 1.6 because Fiji does not launch with ij.jar files compiled for Java 8.

-wayne

IJ.log("IJ module = " + IJ.class.getModule()); IJ.log("IJ module name = " + IJ.class.getModule().getName());

gives

IJ module = unnamed module @10571272 IJ module name = null

and also the module is not listed by

for (Module m : ModuleLayer.boot().modules()) { IJ.log(m.toString()); }

Unfortunately this is the same for other external modules that are loaded by IJ (including my own). Being no expert on this, the motive behind this question is that I want to use annotations on imported modules for specific settings.

Is this perhaps related to ij.jar being compiled for language level 1.6?

Running IJ 1.53v under Java 17.0.5 (WIn7).

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[imagingbook]

Interesting ... (that was quick)! Just guessing, but could it be necessary to define a dedicated ModuleLayer for IJ's class loaders to make modules "visible"?

https://stackoverflow.com/questions/72412555/whats-the-relationship-between-a-classloader-and-a-module-as-per-java-9 https://docs.oracle.com/javase/9/docs/api/java/lang/ModuleLayer.html

[rasband]

ModuleLayer requires Java 9 or later, so it is not something ImageJ can use.